Question

A coil with an area of 0.10 m^2 is in a magnetic field of 0.20 T perpendicular to its area. It is flipped through 180 so that the part that was up is down. The flip takes 1.0 s. Estimate the average induced emf between the ends of the coil while it is flipped.

Answer 1

0.040 V

Step-by-step explanation:

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Answer 2

0.02 V

Step-by-step explanation:

Parameters given:

Area of coil, A =
`0.1 m^2`

Magnetic field, B = 0.2 T

Time taken for flip, t = 1 s

Angle of flip, θ = 180°

The average induced EMF in a coil of area, A, due to a changing magnetic field, B, is given as:

V = -BA(cosθ)/t

This is because the magnetic field has changed orientation by an angle θ.

Therefore, EMF induced will be:

`V = (-0.2 * 0.1 cos180)/(1)\\ \\\\V = 0.2 * 0.2\\\\\\V = 0.02 V`